I stumbled across this bike (caterpillar P5000 Power Loader)
on the Radavist and was wondering if anyone knows actually made these bikes for Caterpillar?
There is nothing much I can find online about this specific model either.
I Trek/Fisher/Klein had an unusual lh rear dropout that takes their rear disc brake adapter.
Why don't you have the front wheel and fork in the photo? It looks like something is going on there.
From what I can see of the front fork, it looks like a cargo bike with a smaller front wheel. My guess is that it is someones custom innovation/ restoration. VERY COOL, I'd own it!